OTB1CDDM24LP | Schneider Electric CANopen I/O Module

Product Overview: OTB1CDDM24LP Distributed I/O Module

The Schneider Electric OTB1CDDM24LP is a distributed I/O expansion module from the Advantys OTB series. As a bus coupler and I/O slave, it provides 16 digital inputs and 8 relay outputs. It communicates via a single CANopen SUB-D9 port. This module operates as a slave device within an OTB island. It does not include a programmable controller. Therefore, it requires a head network interface module (NIM) for communication. The OTB1CDDM24LP is now discontinued. Schneider Electric recommends the TM3BCEIP with TM3 distributed I/O as a replacement path.

Key Technical Specifications of the OTB1CDDM24LP

• Digital Inputs: 16 channels, 24 Vdc, sink/source, Type 1 per IEC 61131-2.
• Digital Outputs: 8 relay outputs rated at 2 A.
• Supply Voltage: 24 V DC (20.4 to 26.4 V).
• Power Consumption: 19 W.
• Bus Current: 700 mA at 26.2 V (supply circuit).
• Communication: 1× CANopen (SUB-D9), slave protocol.
• Protection Rating: IP20.
• Dimensions (H×W×D): 90 × 55 × 70 mm.
• Weight: 0.195 kg.

Notably, this module lacks analog I/O, high-speed counters, and pulse outputs. For these functions, refer to the official datasheet or select a different Advantys OTB module.

Comparison with Similar Distributed I/O Modules

When compared to other distributed I/O modules, the OTB1CDDM24LP offers a specific mix of digital I/O and relay outputs. However, its CANopen-only interface and discontinued status limit its use in new installations. The table below contrasts it with typical alternatives.

For engineers seeking precise electrical specifications, the OTB1CDDM24LP remains a verified option for legacy CANopen systems. Yet, its relay outputs may wear over time. Therefore, consider the replacement path for long-term reliability.

Integration and Compatibility Notes

The OTB1CDDM24LP integrates into an Advantys OTB island as an expansion module. It inherits communication from the head NIM. Consequently, it does not have its own network interface. When wiring into a CANopen network, you may require an external gateway or connection module. Confirm cables and gateways with the supplier to ensure exact compatibility. The module operates within a temperature range of 0 to +55 °C and a relative humidity of 10 to 95% (non-condensing). Its IP20 rating suits controlled cabinet environments.